Interesting project and defiantly different. I have also read about sound and how it can be used with the reverberations. It is an interesting subject. Also seen the effects by watching Ancient Aliens, LOL. It's all in theory but can be enlightening.
It appears that you have made a great box with some accurate details, the copper pyramid on the top is wonderful and could be copied for other items, I'll have to remember that. Not sure what else I can say.